Schnelle reportedly went to the home of her former boyfriend, Robert Cramer II, 32, of 211 McShane Ave., about 7 a.m. March 31. The two had broken up after dating for about two years.

The 19-year-old reportedly had seen images of Cramer with Buehner on Facebook.

Canonsburg police said Schnelle reportedly had intended to kill the new girlfriend and then kill herself.

When police arrived at Cramer’s home, they found Buehner seated at a kitchen table being treated by Cramer’s mother. Police said they went downstairs and found Cramer restraining Schnelle. When Cramer released her, police said she grabbed an open bottle of bleach and tried to drink it before officers knocked it away.

Cramer told police he and Buehner were sleeping when Schnelle came in and started stabbing his girlfriend with a kitchen knife. Schnelle was able to enter the home using her own set of keys, police said. Buehner was taken to Allegheny General Hospital in Pittsburgh for treatment.

Police said that inside Scnelle’s car, they found a note she wrote to her mother asking for forgiveness, as well as a receipt for the bleach she purchased earlier that morning.

Schnelle, who had been scheduled for a preliminary hearing before District Judge David Mark, remains in the the Washington County jail on $25,000 bond.